microscopes required practical

• What is the first step in the microscope practical?

  Collect a microscope slide.
• Which tool is used to add the onion epidermis?

  The forceps.
• How many drops of iodine solution should be added and what tool is used?

  2 drops using a pipette.
• How should the coverslip be lowered and what must you avoid?

  Carefully lower the coverslip using the mounted needle, avoiding air bubbles.
• Which objective lens should be used first and why?

  The lowest power objective lens (×4) because it gives the biggest field of view and is easier to focus.
• How do you adjust the microscope to bring the objective lens closer to the slide?

  Use the coarse adjustment while looking at the microscope from the side.
• What should your final drawing include?

  A labelled pencil drawing of the cells with labels for visible structures and the magnification used.